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Vishay General Semiconductor - Diodes Division SMBJ7.5CAHM3/I
- Part No.:
- SMBJ7.5CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CAHM3/I.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,626
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Product details
Overview
SMBJ7.5CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA test current, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ7.5CAHM3/I datasheet, SMBJ7.5CAHM3/I pinout, SMBJ7.5CAHM3/I application, or SMBJ7.5CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.55), halogen-free RoHS-compliant construction (HM3 suffix), AEC-Q101 qualification readiness, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical bidirectional avalanche behavior - no polarity marking required. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable breakdown under repetitive 10/1000 µs transients at 0.01% duty cycle.
Thermal performance is defined by RθJA = 100 °C/W and RθJL = 20 °C/W, with operating junction temperature range from –55 °C to +150 °C. The HM3 suffix confirms halogen-free, RoHS-compliant, commercial-grade construction meeting JESD 201 Class 2 whisker resistance and MSL Level 1 reflow profile (peak 260 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse stand-off voltage before clamping begins; defines safe operating margin below breakdown |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1 mA - guaranteed avalanche initiation window; ensures consistent turn-on across production lots |
| VC @ IPPM | 12.9 V at 46.5 A - clamped voltage during 10/1000 µs transient; determines protected circuit's maximum overvoltage exposure |
| PPPM | 600 W - peak pulse power handling per 10/1000 µs waveform; supports robust protection against IEC 61000-4-5 surge events |
| ID @ VWM | 100 µA max - reverse leakage at rated stand-off; low enough to avoid signal integrity degradation on high-impedance lines |
| TJ max. | +150 °C - maximum junction temperature; enables reliable operation in enclosed industrial enclosures without forced cooling |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with JEDEC MS-012 |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity; no orientation required during placement |
| Case | Non-conductive molded body | UL 94 V-0 rated epoxy housing provides electrical isolation and flame resistance in end-equipment |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-to-line) without degradation when mounted on 5 mm × 5 mm copper pads |
| Low clamping voltage ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage stress on downstream ICs - critical for 3.3 V and 5 V logic interfaces |
| Halogen-free & RoHS-compliant (HM3) | Meets IPC-1752A material declaration requirements and environmental compliance for global industrial shipments |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT line logistics |
| AEC-Q101 qualification path | HM3 suffix indicates full process alignment with automotive-grade reliability testing - suitable for industrial transport and base station applications requiring extended lifetime validation |
Applications
| Industrial Motor Drives | Telecom Power Supply Inputs |
|---|---|
|
Use Scenario: Protection of gate drivers and current-sense amplifiers against switching-induced transients in 24 V DC motor control modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across DC bus or signal lines to limit voltage excursions during MOSFET turn-off. Use Value: Clamps transients to ≤12.9 V, preventing latch-up or oxide damage in 5 V-rated op-amps and isolated gate drivers. |
Use Scenario: Input-stage surge suppression on 48 V telecom rectifier outputs feeding backplane distribution networks. IC Role / Device Role / Timing Role: Primary TVS device shunting IEC 61000-4-5 combination wave surges before DC-DC converters. Use Value: Absorbs 600 W pulses without failure, maintaining system uptime during lightning-induced grid disturbances. |
| Automotive Body Control Modules | IoT Sensor Node Interfaces |
|
Use Scenario: ESD and load-dump protection on LIN bus transceivers and LED driver inputs in cabin electronics. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp on unshielded wiring harnesses exposed to ISO 16750-2 pulses. Use Value: Withstands 100 A surge (IFSM-equivalent) and maintains <100 µA leakage at 7.5 V - preserving battery drain budgets. |
Use Scenario: Overvoltage safeguard on analog sensor inputs (e.g., temperature, humidity) connected to long PCB traces in smart building nodes. IC Role / Device Role / Timing Role: Low-capacitance (typ. 150 pF at 0 V) transient suppressor placed adjacent to ADC input pins. Use Value: Prevents sensor offset drift and ADC saturation during electrostatic discharge events up to ±15 kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA-E3/52 | RoHS-compliant but not halogen-free; commercial grade only (no AEC-Q101 alignment) | Lacks HM3's halogen-free certification and whisker resistance class - unsuitable for aerospace or green procurement mandates | Select when cost sensitivity outweighs material compliance requirements and automotive qualification is unnecessary |
| SMCJ7.5CAHM3 | Same electrical specs but in larger SMC (DO-214AB) package; higher thermal mass (RθJA = 50 °C/W) | Offers 1500 W PPPM rating and better sustained surge handling - used where board space permits and higher energy absorption is needed | Choose for high-reliability power supply rails where 600 W is insufficient and layout allows 7.11 mm × 6.22 mm footprint |
Compared with SMBJ7.5CAHM3/I, the E3 variant trades material compliance for lower cost in non-regulated environments, while the SMCJ7.5CAHM3 delivers higher surge capacity at the expense of PCB area - making SMBJ7.5CAHM3/I optimal for space-constrained, environmentally compliant industrial designs requiring precise 600 W clamping.
Availability
SMBJ7.5CAHM3/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and IoT sensor node interfaces requiring stable component supply with halogen-free compliance and MSL Level 1 handling.
Supply support for SMBJ7.5CAHM3/I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets compact, high-power transient suppression in space-constrained SMT designs - engineered for rapid response, repeatable clamping, and seamless integration into industrial, telecom, and transportation systems.
FAQ
What does the "HM3" suffix mean in SMBJ7.5CAHM3/I?
The HM3 suffix in SMBJ7.5CAHM3/I denotes halogen-free, RoHS-compliant construction meeting JESD 201 Class 2 whisker resistance and MSL Level 1 reflow capability. It confirms full compliance with IPC-1752A material declarations and supports environmentally regulated industrial and telecom deployments where brominated flame retardants are prohibited.
Is SMBJ7.5CAHM3/I suitable for automotive applications?
SMBJ7.5CAHM3/I is built on the same qualified process as AEC-Q101-compliant variants (e.g., SMBJ7.5CAHM3_B/H), with identical electrical specs and thermal design. While the /I tape-and-reel packaging is commercial-grade, the die and assembly meet automotive reliability requirements - enabling use in non-safety-critical automotive subsystems pending customer qualification.
What is the maximum clamping voltage of SMBJ7.5CAHM3/I under surge conditions?
The maximum clamping voltage (VC) of SMBJ7.5CAHM3/I is 12.9 V at 46.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed across temperature and production lot, ensuring predictable overvoltage limiting for 5 V logic and interface ICs in real-world surge events.
How does SMBJ7.5CAHM3/I differ from unidirectional SMBJ7.5A variants?
SMBJ7.5CAHM3/I is bidirectional - it clamps transients of either polarity symmetrically, with no cathode band marking. In contrast, unidirectional SMBJ7.5A has a marked cathode and conducts only in reverse bias. The CA version is essential for AC-coupled lines, differential buses, or any application where voltage polarity reversal occurs during transients.
What PCB pad layout is recommended for optimal thermal performance of SMBJ7.5CAHM3/I?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal for SMBJ7.5CAHM3/I to achieve rated 600 W peak pulse power and maintain RθJA ≤ 100 °C/W. Using smaller pads reduces surge capability and risks thermal runaway during repetitive transients - especially above 25 °C ambient.
SMBJ7.5CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 46.5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ7.5CAHM3/I FAQ
1.How can I place an order for SMBJ7.5CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CAHM3/I on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMBJ7.5CAHM3/I reliable?
The price and inventory of SMBJ7.5CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CAHM3/I?
SMBJ7.5CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CAHM3/I order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMBJ7.5CAHM3/I?
For technical support, including SMBJ7.5CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CAHM3/I requirements.
6.How does Aetrix verify that SMBJ7.5CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CAHM3/I products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBJ7.5CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CAHM3/I?
All SMBJ7.5CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CAHM3/I, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMBJ7.5CAHM3/I part is unused and in its original packaging.
Return procedure for SMBJ7.5CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CAHM3/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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